NVD / CVE Program· CNA wikimedia-foundation

CVE-2026-58029: Full Account Takeover from BotPasswords and OAuth via action=changeauthenticationdata

MediumCVSS 5.3 · v4.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 21/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.35% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No special conditions are required; it is repeatable.
Fixed version: Wikimedia Foundation MediaWiki 1.46.0, 1.45.4, 1.44.6, 1.43.9.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Wikimedia Foundation MediaWiki 1.46.0, 1.45.4, 1.44.6, 1.43.9 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Api/ApiChangeAuthenticationData.Php, includes/Api/ApiLinkAccount.Php, includes/Api/ApiRemoveAuthenticationData.Php, includes/Specials/SpecialLinkAccounts.Php, includes/Specials/SpecialUnlinkAccounts.Php. This issue affects MediaWiki: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.

BDU:2026-14995

Published: Jul 1, 2026
Updated: Oct 25, 2026
EPSS: 0.3% · 29th percentile
CWE: CWE-287

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 21 / 40 · 5.3 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · wikimedia-foundation: 5.3; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
mediawiki	mediawiki	cpe:2.3:a:mediawiki:mediawiki

Versions reported by the vendor

Affected version ranges reported by the assigning authority (wikimedia-foundation). Independent of NVD's CPE analysis and usually ahead of it.

Wikimedia Foundation MediaWiki
- before 1.46.0, 1.45.4, 1.44.6, 1.43.9affected · 1.46.0, 1.45.4, 1.44.6, 1.43.9

Affected versions · NVD (4)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

mediawiki mediawiki1.43.0 and later · before 1.43.9
mediawiki mediawiki1.44.0 and later · before 1.44.6
mediawiki mediawiki1.45.0 and later · before 1.45.4
mediawiki mediawiki1.46.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	mediawiki	from 0	—
Debian:13	mediawiki	before 1:1.43.9+dfsg-1~deb13u1	1:1.43.9+dfsg-1~deb13u1
Debian:14	mediawiki	before 1:1.43.9+dfsg-1	1:1.43.9+dfsg-1

Same product

mediawiki: all records

Other highest-scoring records for the same primary product.

CVE-2017-0372Parameters injection in SyntaxHighlight results in multiple vulnerabilities
60This week
CVE-2022-29904The SemanticDrilldown extension for MediaWiki through 1.37.2 (before e688bdba6434591b5dff689a45e4d53459954773) allows SQL injection with…
44Plan
CVE-2017-8809api.php in MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 has a Reflected File Download vulnerability.
41Plan

Published before and after this one in the same product

← EarlierCVE-2026-58026Jul 1, 2026 · $wgNonincludableNamespaces can be bypassed by embedding redirect in other namespaces
0Monitor
← EarlierCVE-2026-58027Jul 1, 2026 · QueryAbuseFilter API can be used to see the hit count of private filters, which is hidden in the UI
21Monitor
Later →CVE-2026-58030Jul 1, 2026 · SyntaxHighlight stored XSS via unsanitized 'linelinks' attribute
21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Wikimedia Foundation MediaWiki	1.46.0, 1.45.4, 1.44.6, 1.43.9	Vendor (CNA)
debian:mediawiki	1:1.43.9+dfsg-1~deb13u1 · Debian:13	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2026-580250 days apartRemote Code Execution via Unsafe Deserialization in LogItem Import
23Monitor
CVE-2025-61646149 days apartWatchlist group mode reveals authors of edits with hidden authorship
4Monitor
CVE-2026-88570 days apartFull RCE using EasyTimeline Extension
1Monitor

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-26-0478 · Jul 2, 2026(Wikimedia Foundation MediaWiki Güvenlik Zafiyeti)

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: P
Scope: X

Weakness class (CWE)

CWE-287 · Improper Authentication

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Root cause

Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.

The bug in code

The whole CWE-287 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1app.use("/admin", requireSession, adminRouter);
2

3// Route added later skips the middleware
4app.post("/admin-api/config", updateConfig);

Fixed

1const admin = express.Router();
2admin.use(requireSession, requireRole("admin"));
3

4admin.post("/config", updateConfig);
5app.use("/admin", admin);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:09 PM UTC

For records you follow, these changes also arrive as notifications. →

References

phabricator.wikimedia.org/T422676

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records